<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>背景图像的大小</title>
		<style type="text/css">
			div{
				width: 600px;
				height: 400px;
				background: #116699 url(img/td.jpg) no-repeat center;
				background-size: 60%;
			}
		</style>
	</head>
	<body>
		<div></div>
	</body>
</html>